9451661 has 4 divisors (see below), whose sum is σ = 9482172. Its totient is φ = 9421152.

The previous prime is 9451657. The next prime is 9451669. The reversal of 9451661 is 1661549.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 8584900 = 931^2 + 2930^2 .

It is a cyclic number.

It is not a de Polignac number, because 9451661 - 2² = 9451657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9451669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14786 + ... + 15411.

It is an arithmetic number, because the mean of its divisors is an integer number (2370543).

Almost surely, 2^9451661 is an apocalyptic number.

It is an amenable number.

9451661 is a deficient number, since it is larger than the sum of its proper divisors (30511).

9451661 is a wasteful number, since it uses less digits than its factorization.

9451661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30510.

The product of its digits is 6480, while the sum is 32.

The square root of 9451661 is about 3074.3553795877. The cubic root of 9451661 is about 211.4313480756.

The spelling of 9451661 in words is "nine million, four hundred fifty-one thousand, six hundred sixty-one".